In the Netherlands, RO & AD Architects designed a unique bridge to cross a moat at Fort De Roovere in Halsteren [page in Dutch].
RO & AD architects found it really strange to create a bridge over a canal of a fortification. Especially because the bridge must be built on the side where traditionally the enemy was expected. Therefore, RO & AD architects created a bridge that is not visible from a distance….
The bridge they created places the people crossing it below the waterline, so when seen from afar, the bridge disappears. Hense, the “Moses Bridge.”
More photos and information at Architizer, My Modern Met, and de Architect [page in Dutch].